Improvement in lappet-looms



UNITED STATES PATENT OEEIGE.

IM PROVEMEN'F IN LAPPET-LOOMS.

Specification forming part of Letters Patent No. 112,785, dated tMarch 21, 1871 To all whom it may concern:

Be it known that we, JOSEPH GLOUGH and J osnrn CRoMrToN, of Chiccpee, in the county of Hampden and State of Massachusetts, have invented a new and luseful Improvement in Machines for Weaving Embroidery; and we do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing,forming part of this specification.

This invention relates to improvements in machinery for weaving embroidery; and it consists in an improved arrangement of adjustable cams and connecting-rods with the needle-bars and a pattern wheel or former, having for' its object to enable us to weave three distinct patterns simultaneously.

It also consists in an improved arrangement of the driving-gear for working the patternwheel, calculated to facilitate the setting of the pattern-wheel back or adjusting it with exactness, to make the exact adjustments of the needles with the pattern often lrequired in case of accidents.

y Figure l is a view of our improved embroidery attachment to looms, partly in elevation and partly in section, the section being taken 0n the line a: a: of Fig. 2. Fig. 2 is a section on the line y y of Fig. 1, and Fig. 3 is a partial face view of our improved cam-wheel.

-Similar letters of reference indicate corresponding parts.

A is the frameB 131.132 the needle-bars, and C the needles, of an embroidery attachment .to ordinary looms commonly placed on the lathe, and arranged so `that at the backward vibration of the4 lathe, they are lifted, and let fall at the forward vibration. The said bars also have a lateral movement, which has been heretofore accomplished by the sliding rods a b d and a cam, E, the rods being attached to the bars by the arms F F1 F2, and the cam-wheel having a ratchet-rim, E, a tooth et' which is brought against a pusher at each alternate movement of the lathe.

We now propose to attach the rods to the arms so that the latter may be adjusted on the former, so that we can move our needles and figures in the cloth as we may require, which we do by fitting the blocks e, connecting the arms with the rods so that they may slide on them, and providing set-screws f tohold them at any point. We also provide the cam-wheel with three sets of tappets, Gr H I, the one H being permanently attached to the wheel or cast with it, and the other two being formed of separate blocks K, each tappet consisting of one block; and these blocks are attached to the wheel by set-screws or other suitable means in any way to admit vof their being adjusted toor from the rods they act against to vary theirarran gement for varying the figures.

The tappet-rim Gr acts upon the rod a connected tothe arm F of l needle-bar B, the rim I actsnpon the rod b attached to arm F1 oi' needle-bar Bl, and the rim H acts npn the rod h, which carries a roller,-'i, over which a chain, k, connected to the rod d of needle-Dar2 works, said chain being connected at the other end to the upper end of the lever l, pivoted at the lower end, and bearing between the ends against a pattern-wheel, m, turning loosely on the shaft p, and arranged to move the rod d, through the medium of this lever, chain, and wheel c', in the same direction the other rods are moved by the cam-wheel; but the movement will be governed by the configuration of the pattern-wheel, while the movements ot' the rods a and b are governed by the cam-tappets. All the rods are moved back by spiral 4springs. 'n attached to them at one end and to the frame at the other.

It will be seen that, by these arrangements, three distinct and dii'erent patterns are provided, and each set of needles will be worked according to its pattern simultaneously with the working of the others.

The cam-wheel E lturns loosely on the shaft p, on which the pattern-wheel mis also mounted, and it has a small friction-wheel, g', gearing with another larger one, r, working loosely on the shaft s, which is mounted on eccentric bearings t n and provided with a hand-lever, Src., for turning it to engage or disengage these wheels with-each other. The wheel e has a hub, a', gearing with a friction-disk, y, on the pattern-wheel m. The latter thus derives motion from the cam-wheel E. The said patternwheel m moving at a slower rate than the tappet-wheel E has the e'ect of working the needle-bar B2 according to a predeterminedV terns; and the patterns may be varied by changing the pattern-rims of the said patternwheel, thus producing the same eilects as if the tappets H' were also adjustable. This arran gement of the friction drivin g-gear and the eccentric shaft is provided to afford thc greatest facility for disconnecting the pattern-wheel and setting it back, as is often required for adjusting the needles to the figure when anything occurs to interfere with their relative arrangements.

Bynsing the friction-gear the adjust-ment may be made more exactly than could be done with cog-wheels, the movements of which in relation to each other could not not bc less than the measurcmentof the. pit-eh of the teeth.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. The cam-wheel E, provided with one set of fixed tappets, H, the two sets of adjustable tappets G I, and combined with the sliding rods for working the needle-bars, the wheel i, chain, lever, and pattern-Wheel 1n, all substantially as specified.

2. The combination, with the cam-wheel E and patternwheel m, of the friction-wheel g, wheelr, friction-disk y, and the eccentric shaft s, all substantially as specified.

JOSEPH CLOUGH. JOSEPH CROMPTON.

Witnesses:

THOMAS FARMER, JOHN CRoMPron. 

